quick books 2007/08

Hi, I am a small business operator who is using Quick books 2007/2008.today when i went to open it it just won't respond. I have tried uninstall and reinstall still not responding.I run the software on my desktop, and after double clicking it, it opens and asks for my file password. after that it goes grey as below:

then if i click somewhere on the screen it gives me the below screen showing (not responding)

Both files have the same outcome. I made a quote for a customer yesterday morning and in the evening when I ran the software again it started to give this issue. I thought it was some glitch so left it. But when I came to use it again this morning the issue had not be resolved.

Ok, I know you've mentioned you've already uninstalled but can I ask that you perform a 'clean' uninstallation, that is removing all components of program from your PC before installing again. You may need a third party removal tool such as Revo Uninstaller for this but please check out the process in this KB article -

i uninstalled the quick books using Revo uninstaller, but it is still appearing on the desktop. but i can't see it in the control panel programs and features option. If i double click the desktop icon, it runs the software and ends up at the same error page.

I just reinstalled it and after restarting it came up with an error screen: "an installation support file could not be installed. Catastrophic failure."